Hitachi High Quality Wheeled Excavators

Excavators

Hitachi wheeled excavators are a series of high-tech and multifunctional machines ZX and ZAXIS-3 series, which have managed to occupy their niche in the middle price segment . This special equipment is aimed at the markets of developing countries, including the CIS countries. Excavators are able to function normally even when using low-quality fuel, which is a big advantage for the domestic market.

Scope of application

Hitachi excavators on a pneumatic wheel base are widely used for the following activities:

• digging pits for subsequent installation of foundations in them;
• development of trenches for pipelines and network communications;
• creation of artificial reservoirs and pools;
• mining in quarries with a small area;
• leveling and leveling of embankments;
• loading and unloading of bulk materials;
• construction of earthen ramparts;
• demolition of buildings using concrete breaking equipment;
• driving piles using a hydraulic hammer;
• drilling wells when installing auger equipment.

It should be noted that the use of machines of this type is especially effective when carrying out excavation work in areas with complex terrain.

Hitachi Excavator: Description

Hitachi excavators are manufactured in Japan at the Hitachi Construction Machinery plant. Today, the Hitachi plant supplies equipment for almost 40% of total global consumption. The excavator line includes machines for use in construction and quarries.

The model range is represented by modifications ZX and EX. In total, there are eight models in the Hitachi excavator line, each of which is equipped with working equipment such as a front and backhoe. Such machines are designed for developing quarries and other soils and loading them into vehicles. Excavators can be used:

• on blasted rocks;
• for the extraction of minerals directly from the massif;
• on construction sites;
• in production.

The distinctive features that have allowed Hitachi technology to gain a huge share of the global market are:

• high performance of excavators on all types of soil. A striking example: Hitachi 330 Excavator;
• reliability and durability under any severity of operation;
• environmental safety of engines established by European standards.

The environmental friendliness of Hitachi excavators is ensured by low-toxic, minimal diesel engine emissions. Lubrication and hydraulic systems are equipped with protective mechanisms to prevent fluid leakage.

Capabilities and technical characteristics of wheeled excavators

Hitachi wheeled excavators are represented by the following model range: EX 100 (WD, WD-2, WD-3 and WD-3C); EX 60 WD-2; EX 135W; EX 165W; ZX 210W; ZX 180W; ZX 140 (W, W-3); ZX 170W-3; ZX 190W-3 and ZX 210W-3. This equipment is characterized by high power of the power unit and impressive wear resistance of the working equipment. Each of the machines is equipped with a comfortable workplace, which is equipped with heating equipment and air conditioning.

Hitachi EX 100WD, EX 100WD-2, EX 100WD-3 and EX 100WD-3C

This series of wheeled excavators has a reinforced cabin with a good panorama, thanks to the large glass area. It is protected from tipping over and can withstand significant shock loads. The main load-bearing elements of the machines consist of monolithic plates made of high-strength steel.

Hitachi EX 100WD

This line of special equipment has the following characteristics:

• engine power is 81.0 (57.0; 58.2 and 65.6) kilowatts;
• operating weight - 10.6 (11.4; 10.7 and 10.7) tons;
• vehicle transport speed - 34.5 kilometers per hour;
• all types of machines can be equipped with buckets with a capacity from 0.17 to 0.80 cubic meters;
• the fuel tank is designed for 250 liters;
• hydraulic reservoir - 69 l;
• the maximum digging depth is 4.76 meters;
• maximum digging radius - 7.70 m;
• excavator dimensions: length - 7.11 (7.27) m; width - 3.49 (3.64) m; height - 3.02 (3.48) m.

Hitachi EX 60 WD-2, EX 135W and EX 165W range

Hitachi equips this series of equipment with a GPS navigation system, an anti-theft system and a rear view camera. Thanks to the improved design of the hydraulic system, the speed of the boom has increased significantly. Diagnostics and monitoring of the condition of equipment is carried out by the integrated e-Service system, which allows its maintenance to be carried out as quickly and efficiently as possible. This category of equipment is distinguished by the following indicators:

• the power of the power plant is 49.0 (76.0 and 114.0) kilowatts;
• the weight of the machines reaches 6.78 (16.00 and 18.00) tons;
• movement speed - 34.5 (32.5 and 29.0) kilometers per hour;
• maximum bucket capacity - 0.34 (1.0 and 1.2) cubic meters;
• the fuel tank volume is 135 (250 and 300) liters;
• maximum depth of soil development - 4.46 (5.23 and 5.72) meters;
• the maximum digging radius reaches 6.31 (7.62 and 8.50) m;
• machine dimensions: length -6.01 (7.10 and 7.30) m, width - 2.33 (2.49 and 2.67) m and height - 3.12 (3.22 and 3.52) m .

Hitachi EX 165W

Hitachi EX135W

Hitachi ZX 180W and ZX 210W models

A special feature of these brands of machines is the presence of twin wheels, which reduce the pressure on the ground, which significantly increases the maneuverability of excavators on difficult soils. The equipment is also equipped with special shock absorbers that help reduce to a minimum vibrations that occur during the operation of technological equipment.

Hitachi EX 210W

Hitachi EX 180W

Excavators have the following characteristics:

• engine power is 90.0 (110.0) kilowatts;
• the equipment has a mass of 18.6 (20.3) tons;
• transport speed - 30.0 (25.0) kilometers per hour;
• the maximum bucket capacity is 0.7 (0.8) cubic meters;
• fuel tank capacity - 280 (340) liters;
• the volume of the hydraulic fluid tank reaches 100 (135) l;
• maximum depth of soil development - 5.79 (6.42) meters;
• maximum digging radius - 9.52 (10.15) m;
• vehicle dimensions: width - 2.53 m and height - 3.09 (3.11)

Models Hitachi ZX 140W and ZX 140W-3

The excavators in this series feature the NewE-Mode function, which increases productivity and reduces fuel consumption by 20%. Thanks to the improvement of the design of the machines, their supporting frame acquired a larger cross-sectional area, which increased the reliability and durability of the working equipment.

Hitachi ZX140W

These types of machines differ in the following values:

• engine power - 90.2 kilowatts;
• the vehicle weight reaches 15.7 (16.0) tons;
• the vehicle speed is 35.0 kilometers per hour;
• maximum bucket volume - 0.66 cubic meters;
• fuel tank capacity - 250 liters;
• the greatest digging depth is 4.61 (5.52) meters;
• maximum excavation radius - 8.04 (8.87) m;
• Dimensions of the equipment: width - 3.38 m and height - 3.13 (3.24) m.

The Hitachi ZX 140W-3 model has been modernized and bears the ZAXIS-3 mark. Which means the presence of a new HIOS II hydraulic system and a new 4-valve DOHC diesel engine.

Dimensions and specifications of Hitachi ZX 140W-3:

Models ZX 170W-3, ZX 190W-3 and ZX 210W-3

Excavators in this line are equipped with a four-cylinder Isuzu AI-4HK1X engine, which have high power, low noise levels (5 decibels) and a small amount of harmful substances resulting from the waste of diesel fuel.

All these models are marked ZAXIS-3. This indicates the presence of a new HIOS II hydraulic system and a new 4-valve OHC diesel engine. They are equipped with new rear view equipment (available on separate orders).

All models have built-in information technology, similar to the Hitachi ZX 140W-3.

The technique is characterized by the following indicators:

• the power of the power unit is 107.0 (122.0) kilowatts;
• the operating weight of the equipment reaches 18.6 (20.4 and 20.8) tons;
• vehicle speed - 35.0 (28.0 and 27.5) kilometers per hour;
• maximum bucket volume - 0.82 (1.20) cubic meters;
• the fuel tank has a capacity of 290 (340 and 355) liters;
• maximum digging depth - 5.72 (5.93 and 6.29) meters;
• maximum digging radius - 9.08 (10.02 and 10.17) m;
• Dimensions of special equipment: width - 2.53 m and height - 3.09 (3.11) m.

Dimensions and specifications of Hitachi ZX 170W-3:

Dimensions and specifications of Hitachi ZX 190W-3:

Dimensions and specifications of Hitachi ZX 210W-3:

HITACHI hydraulic mining excavators

O.P. Ivanov, General Director of Tekhstroykontrakt LLC

This year, a series of articles are published on the pages of our magazine devoted to the products of the HITACHI Construction Machinery Co., Ltd. corporation, sold on the Russian mining equipment market by its official dealer -.

In No. 1*2005 an article was published about quarry dump trucks, in this issue we offer an article about quarry-type hydraulic excavators.

The production of HITACHI hydraulic crawler excavators is concentrated in Japan, Fukaya, Bunkyo-ku, Koraku Kosumigaura Works (ZAXIS), at the facilities of the specialized division HITACHI Construction Machinery Co., Ltd. The complete line of excavators includes construction and mining machines.

Over a 30-year period, HITACHI Corporation has supplied more than 4,000 mining excavators of all models and modifications to the markets of mining countries around the world. Average annual sales of excavators reached 250 machines, which accounts for 34% of global consumption.

The modern standard range of HITACHI hydraulic mining excavators is represented by the ZX and EX series and includes 8 models. All models are produced with working equipment such as a forward and backhoe (Tables 1 and 2).

HITACHI hydraulic mining excavators are designed for mining and loading into vehicles

both blasted rocks and overburden rocks and minerals excavated directly from the massif.

HITACHI quarry excavators are distinguished by high operational reliability, provide high productivity and environmental safety when performing excavation and loading operations.

The environmental friendliness of HITACHI excavators is due to minimal and low-toxic diesel engine emissions that are environmentally friendly and meet stringent standards set by the US Environmental Protection Agency. In addition, the designs of mechanisms using fuels and lubricants and coolants provide reliable measures to prevent leaks of these liquids into the environment.

The achievable parameters of the faces of excavators with working equipment such as front and backhoes are illustrated by the diagrams in Fig. 1 and the data in Table. 1 and 2.

Rice. 1 Parameters of the working area of ​​HITACHI EX 5500 excavators with forward (a) and backhoe (b) equipment

A number of modern design solutions have provided significant advantages of using HITACHI hydraulic excavators in quarries compared to cable shovels with traditional working equipment, as well as analogues from other companies in the world.

The use of high-strength steels in critical mechanisms and low-alloy steels in the main metal structures of the excavator ensures its reliable operation under high dynamic loads, in ambient temperatures from -50° to +40°C. The rigid D-shaped frame protects the rotary platform from deformation when moving the excavator and performing scooping operations.

The chassis of the excavators is of the tractor type. The supporting frame is a welded structure made from special grades of rolled steel for harsh working conditions. The side track frames are welded to the supporting frame. The support and support rollers, idler wheels and track drive sprockets are lubricated and protected by floating seals. The hydraulic track tensioning mechanism is equipped with a shock-proof spring shock absorber. Track shoes are made from a special rolled alloy and are induction hardened. The hydraulic mechanism of the excavator ensures smooth movement and high maneuverability of the machine.

The operator's cabin is spacious, meets ISO standards, is independent, suspended on elastic and vibration-damping supports. Windows (with tempered glass on 4 sides) provide all-round visibility. The front windows can be completely removed and stored in the cab. In general, the machines are designed in such a way as to create comfortable conditions for the operator and ease and speed of routine maintenance and repairs for mechanics.

Comfortable conditions are ensured not only by the convenient arrangement of instruments on the control panel and in the cabin space and their ergonomics, but also by the design of the chair, which allows the operator to choose a comfortable position, and by the ventilation and air conditioning system in the cabin, which provides pressurized air inside the cabin to prevent dust from leaking into it. .

The arrangement of units and machines of all models on a rotating platform ensures easy accessibility to each of them, which facilitates the rapid implementation of routine inspections, maintenance and repairs.

Table 1 Technical characteristics of HITACHI excavators with straight shovel working equipment

Hitachi EX 5500 excavator operator's workplace
Thanks to the arrangement of walking platforms and corridors in the center and along the periphery of the rotary platform, the time for performing these types of work is minimized. The reliability of excavator operation is also supported by a centralized system of automated supply and distribution of lubricant to the friction pairs of components and assemblies, including the rotating fingers of the bucket, handle and boom, as well as to the rollers of the slewing ring. Thanks to this system, there was no need for daily and very labor-intensive manual lubrication of the machine, which led to an increase in its technical availability.

The EX 1900-5 model excavator with backhoe working equipment is available in six modifications, differing in boom length (from 8.3 m to 11.8 m) and arm length (from 3.6 m to 7.0 m) and the corresponding face parameters. Basic modification - equipped with an 8.3 m long boom and a 3.6 m handle.

The EX 2500 model, upon customer request, is equipped with a power unit based on an 860 kW electric motor (operating voltage 6600 V and current frequency 50 Hz) instead of a diesel engine.

For the majority of manufactured models of HITACHI excavators, a number of buckets are provided, the capacity of which ensures loading of dump trucks of various loading capacities for the optimal number of working cycles (within 4-6 cycles). At the request of consumers, mining excavators of the ZX models can be supplied either with a rock bucket (unloading through the bottom) or with a replaceable bucket, unloaded by tipping through the front cutting edge. The design of the “straight shovel” rock bucket fastening unit to the handle allows its cutting edge to be deflected at an angle from 55° to 70°.

Table 2 Technical characteristics of HITACHI excavators with working equipment: backhoe

BH - standard working equipment: BE - working equipment with short handle

One of the significant advantages of HITACHI hydraulic excavators with a diesel power unit is good adaptability to diesel fuel supplied to various regions of Russia, and especially to remote and northern territories.

As is known, a common advantage of hydraulic mining excavators (over shovels) is the smooth, almost shock-free unloading of rocks from a bucket of any capacity into the body of transport vessels. This effect was made possible due to the controlled and dosed opening of the bucket bottom with the formation of a fixed-sized unloading slot through which the rock is released. All rock buckets of HITACHI excavators have this design solution, designed for excavation and loading operations in faces of blasted rock and semi-rock, as well as in unprepared faces of cohesive and soft rocks.

In addition, all rock buckets are equipped with quick-release side and cutting edge wear protection plates. For excavating loose and loose rocks, some excavator models can be supplied with a replaceable bucket that can be tipped over the front cutting edge.

The use of rock buckets with unloading through the bottom on HITACHI mining excavators not only helps eliminate the dynamic impact of unloaded rocks on the bottom of the body and the suspension of the dump truck, but also minimizes dust formation in the face and spillage of soil outside the body onto the work site.

Ultimately, the unique operational and technical characteristics of HITACHI excavators are ensured by:

— high viewing height from the operator’s seat (up to 6.1-7.7 m), providing a comprehensive overview of the face and the loaded dump truck;

— high ergonomics of the operator’s workplace, minimizing his manipulations and leading to minimal human fatigue when operating the machine;

— installing the cabin on vibration-damping elastic liquid cushions and supports and equipping it with a canopy and canopy to protect against falling pieces of rock;

— a wide range of standard and additional mechanisms and devices (options) that facilitate the operation and maintenance of the excavator. The above characteristics allowed the designers to solve one of the main tasks - to minimize operator fatigue when operating the machine during a work shift.

The experience of the HITACHI company and its official dealer Tekhstroykontrakt LLC in the markets of Russia and some CIS countries shows that the rate of distribution of its products is increasing from year to year. And this is due both to the emergence of new mining enterprises and to the development of long-established Russian companies that are going through the stage of technical re-equipment and renewal of the fleet of mining and processing plants. At the same time, some of them give preference to mobile equipment based on diesel engines and hydraulic drives, abandoning traditional and familiar machines based on network electric drives.

Today, Hitachi crawler hydraulic excavators are widely used in stripping and mining operations of powerful coal mines, alluvial and primary deposits of gold and other ores. In addition, they are used in many countries around the world in quarries that develop raw materials for the building materials industry (clays, sands, marls, limestones, etc.). They work effectively in trenching, canal and dam construction, transport construction and mass excavation work in industrial construction. Hitachi excavators are widely used for the development of many man-made deposits (sludge dumps, tailings dumps, dumps of substandard minerals and overburden rocks, etc.).

It should be noted that in Russia and the Republic of Uzbekistan, the following models of HITACHI excavators are effectively used during open-pit mining:

• EX 1800 on coal - Ushumunsky (Birobidzhan);

• EX 1200 at gold mines - Khakanja in the Khabarovsk Territory and Darasun in the Chita Region;

• ZX 800 on gold-silver - Dukat, Lunnoe in the Magadan region, Myandukha in the Arkhangelsk region, Kansk coal in the Krasnoyarsk region and magnesite in the Chelyabinsk region;

• ZX 600 at the gold mine - Mnogovershinnoye in the Khabarovsk Territory, at the coal mine - Gubernsky in Kemerovo and bauxite - in the Komi Republic;

• EX 3600 - at the gold mine - Muruntau (Uzbekistan) Negotiations are underway and contracts are being prepared for the supply of excavators to a number of other mining companies in Russia and the CIS countries

Detailed information about the full range of models of HITACHI hydraulic excavators, the terms of their delivery and maintenance in Russia can always be obtained from Tekhstroykontrakt LLC.

Today, the dealer and service network of equipment with the HITACHI brand, which is maintained by Tekhstroykon-tract LLC in Russia and the CIS countries, is one of the most extensive.

An extensive network and a high level of service, along with highly qualified specialist personnel, make it possible to satisfy the individual wishes and requests of Tekhstroykontrakt LLC clients in different parts of Russia.

Specialists carry out the optimal selection of machinery and equipment with the best functional and cost characteristics, taking into account the individual needs of mining enterprises and companies.

Magazine "Mining Industry" No. 2 2005

Features of the technology

Hitachi wheeled excavators can be characterized as a universal type of equipment designed for excavation and loading and unloading operations. These machines are in great demand among construction organizations, since their use allows them to carry out a significant amount of work in the shortest possible time. The main advantages of this type of excavator include:

• impressive depth of soil development;
• the presence of a large-volume bucket;
• stability of equipment when driving over rough terrain;
• smooth movement of the boom;
• wide range of attachments;
• ergonomics of machines;
• reliable and high-tech cabin;
• engine efficiency;
• high speed of movement of the machine.

Thanks to the wheelbase on which this type of excavator is installed, there is no need to use vehicles to deliver machines to the work site.

Hitachi excavators are positioned as equipment that is capable of efficiently carrying out its production activities in any weather and climatic conditions. The high level of productivity allows the machines to carry out significant volumes of work in the shortest possible time. At the same time, the products of Japanese inventors are distinguished by special parameters of safety, reliability and environmental friendliness, making them very attractive to many customers.

Performance characteristics of Hitachi excavators

The Japanese company Hitachi is known as a manufacturer of electronics and household appliances with a high level of quality and precision assembly. With the same attitude, Hitachi produces serious special equipment, namely multi-level excavators. Hitachi excavators are capable of operating more than 90,000 operating hours without failures or major repairs, while performing their main tasks with maximum precision.

Classification of Hitachi excavators

Engaged in the constant development and modernization of various special equipment, the Hitachi company has brought to the market several dozen models of hydraulic excavators. Regardless of its purpose, each piece of excavator equipment is characterized by high performance and reliability.

The model range of Hitachi excavators is represented by equipment for performing earthmoving work of any complexity and is represented by the main groups of machines:

• small-sized;
• middle class;
• large-sized;
• mountain;
• wheeled.

The serial number of each model is its main difference from other excavator models and its relationship to a particular group. Hitachi 200 and 330 series excavators are middle-class tracked vehicles.

Characteristics of the Hitachi 200 excavator

The Hitachi ZX200 crawler excavator is the original base model of the 200 series. This is a middle class model, with relatively small dimensions and high performance characteristics of the working equipment. The compactness of the body makes it easy to carry out work in hard-to-reach areas.

Most often used for large quarry or construction work that needs to be completed as quickly as possible. At the same time, it differs from other models in its class in its high efficiency indicators associated with low fuel consumption.

Equipping with crawler tracks adds stability and confidence to the overall design on loose or sticky soils, as well as difficult terrain. Correct distribution of the load of the cabin and boom on the tracked base makes it possible to lift loads of varying weights without distortions or displacements. The track system is designed according to the triple grouser principle.

The Hitachi 200 excavator is equipped with an automatic system that operates under increased loads. In such cases, the speed of the working units automatically increases and the movement accelerates. This function is indispensable when working on mountainous terrain or in quarry conditions. This model is able to maintain its performance properties on long climbs with a slope of up to 35 degrees without loss of performance.

The Hitachi ZX200 is equipped with a turbocharged four-stroke diesel engine Isuzu AA-6BG1T with water and intercooling. Engine power corresponds to 150 hp.

Speed ​​switching is carried out using a mechanical stepper system, which has two modes - high and low speed. This means no conventional transmission. In this case, the low speed of movement reaches 3.6 km/h, and the high speed – up to 5.5 km/h.

The maximum lifting height of the bucket reaches 10 m, and the maximum digging depth is slightly more than 6 m.

The work equipment is controlled from a cabin equipped in accordance with all requirements for comfort and simplicity. The cabin has a high level of safety, good visibility and ergonomics.

Each of the Hitachi 200 series excavator models is characterized by the following features:

• ZX 200 – base model;
• The ZX 200 LC-3 is equipped with a cabin air conditioning system and an on-board computer with automation;
• ZX 200 – 3 is equipped with a more powerful engine of 165 hp, and is characterized by a reduction in fuel consumption by up to 10%;
• The ZX 200 - 5G is distinguished by the use of reinforced working and power units and other structural elements in the design.

Characteristics of the Hitachi 330 excavator

Of all Hitachi excavator models, the 330 series is the most popular. Its capabilities and technical characteristics allow you to perform work as efficiently as possible in any climatic conditions, even at low temperatures reaching -40 degrees. Hitachi 330 can be found during northern watches.

Hitachi 330 belongs to the middle class excavators. At the same time, it is confidently considered a universal technique. Operational features fully satisfy the requirements of both small and large industries.

The Hitachi 330 is equipped with a Japanese-made Isuzu AH-6HK1XYSA-01 six-cylinder four-stroke diesel engine with a turbine. An engine of this class is capable of operating without interruption for more than 18,000 operating hours until the first major overhaul.

This excavator model can be equipped with additional hydraulic lines and equipped with various working units:

• hydraulic hammers;
• borax;
• eccentric rippers;
• rotators;
• grips.

The use of a special adapter allows you to quickly change from one equipment to another.

Hitachi 330 has a more modernized approach to providing comfortable control. For example, to install an attachment, the operator will have to get out of the cab just to attach the hoses. The Hitachi 330 excavator is equipped with special rear view cameras as standard. Night operation is also possible on the excavator of this model, thanks to the installation of additional lighting.

All components and mechanisms of the Hitachi 330 excavator are protected from harmful environmental influences and critical temperatures. The use of special technologies to improve the tracked part added weight to the overall design of the excavator, but increased the durability of the chassis elements.

Hitachi: excavators with optimal fuel consumption

Hitachi excavators do not differ in the characteristics of expensive special equipment. This concerns, first of all, fuel consumption. For example, during work related to digging or loosening soil, fuel consumption does not exceed 4.5 l/1 engine hour. Working with a hydraulic hammer will increase the flow rate to 12 liters. The most energy-intensive process is considered to be the operation of an excavator with a hydraulic compressor unit - up to 15 l/hour.

Despite the fact that developers are making every effort to improve the energy efficiency of Hitachi special equipment, the performance and durability of the excavator engine directly depends on the quality of fuels and lubricants.

Video

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